* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    /*文字禁止选中*/
    user-select: none;
}

body {
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #ecf0f3;
}

.page {
    width: 900px;
    height: 540px;
    display: flex;
    box-shadow: 10px 10px 10px #d1d9e6, -10px -10px 10px #f9f9f9;
    border-radius: 12px;
    overflow: hidden;
    position: relative;
}

.reg-left,
.login-right {
    width: 360px;
    height: 100%;
    box-shadow: 4px 4px 10px #d1d9e6, -4px -4px 10px #d1d9e6;
    padding: 55px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow: hidden;
    transition: 1.5s ease;
}

.reg-right,
.login-left {
    width: 560px;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    transition: 1.5s ease;
}

.login-right {
    position: absolute;
    right: -380px;
    top: 0;
    background-color: #ecf0f3;

}

.login-left {
    position: absolute;
    left: -580px;
    top: 0;
}

.reg-left {
    position: absolute;
    left: -400px;
    top: 0;
    background-color: #ecf0f3;
    z-index: 2;
}

.reg-right {
    position: absolute;
    right: -600px;
    top: 0;
}

.reg-left h2 {
    font-size: 30px;
    font-weight: 700;
    color: #181818;
}

.reg-left p,
.login-right p {
    font-size: 12px;
    text-align: center;
    color: #a0a5a8;
    margin: 30px 0;
    letter-spacing: 1px;
}

.reg-left button,
.login-right button {
    width: 145px;
    height: 40px;
    border: none;
    background-color: #4b70e2;
    color: #f9f9f9;
    border-radius: 25px;
    letter-spacing: 5px;
    font-weight: 700;
    cursor: pointer;
    transition: .5s;
}

.reg-right input,
.login-left input {
    width: 315px;
    height: 36px;
    margin: 8px;
    padding-left: 25px;
    font-size: 12px;
    border: none;
    outline: none;
    transition: 0.25s ease;
    background-color: #ecf0f3;
    border-radius: 8px;
    box-shadow: inset 2px 2px 4px #d1d9e6, inset -2px -2px 4px #f9f9f9;
}

.reg-right input:focus,
.login-left input:focus {
    box-shadow: inset 4px 4px 4px #d1d9e6, inset -4px -4px 4px #f9f9f9;
}

.reg-right h2,
.login-left h2 {
    font-size: 30px;
    font-weight: 700;
    color: #181818;
    letter-spacing: 10px;
    margin-bottom: 50px;
}

.reg-right button,
.login-left button {
    margin-top: 30px;
    width: 145px;
    height: 40px;
    border: none;
    background-color: #4b70e2;
    color: #f9f9f9;
    border-radius: 25px;
    letter-spacing: 5px;
    font-weight: 700;
    cursor: pointer;
    transition: .5s;
}

.reg-right button:hover,
.login-left button:hover,
.reg-left button:hover,
.login-right button:hover {
    transform: translateY(-5px);
    transition: .5s;
    background-color: #4662d9;
}

/*圆圈*/
.circle {
    position: absolute;
    border-radius: 50%;
    background-color: #ecf0f3;
    box-shadow: inset 8px 8px 12px #b8bec7, inset -8px -8px 12px #fff;
}

.cir-big {
    width: 450px;
    height: 450px;
    bottom: -320px;
    left: -220px;
}

.cir-small {
    width: 270px;
    height: 270px;
    top: -140px;
    left: 230px;
}

#window {
    width: 250px;
    height: 40px;
    position: absolute;
    top: -50px;
    left: 45%;
    box-shadow: 5px 5px 5px #d1d9e6, -5px -5px 5px #f9f9f9;
    border-radius: 8px;
    text-align: center;
    line-height: 40px;
    color: #7d8184;
    font-weight: bold;
    opacity: 0;
    transition: .8s ease;
}
#regx2 p{
    font-size: 12px;
    color: transparent;
    margin: -5px 0;
}